#include <stdio.h>
#include <unistd.h>
int main()
{
  pid_t id = fork();
  if (id == 0)
  {
    while (1)
    {
      printf("我是子进程,pid:%d, ppid:%d\n", getpid(), getppid());
      sleep(1);
    }
  }
  else if (id > 0)
  {
    int count = 5;
    while (count--)
    {
      printf("我是父进程,pid:%d, ppid:%d\n", getpid(), getppid());
      sleep(1);
    }
  }
  return 0;
}
